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tidy: reorganize plugindb and pull in API support for writes
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| /* | ||
| Copyright 2023 Avi Zimmerman <[email protected]> | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package plugindb | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "strings" | ||
| "sync" | ||
| "time" | ||
|
|
||
| v1 "github.com/webmeshproj/api/go/v1" | ||
|
|
||
| "github.com/webmeshproj/webmesh/pkg/context" | ||
| "github.com/webmeshproj/webmesh/pkg/storage" | ||
| "github.com/webmeshproj/webmesh/pkg/storage/errors" | ||
| "github.com/webmeshproj/webmesh/pkg/storage/types" | ||
| ) | ||
|
|
||
| // OpenKeyVal opens a new key-value store connection to a plugin query stream. | ||
| func OpenKeyVal(srv QueryServer) storage.MeshStorage { | ||
| return &PluginMeshStorage{QueryServer: srv} | ||
| } | ||
|
|
||
| // PluginMeshStorage implements a mesh key-value store over a plugin query stream. | ||
| type PluginMeshStorage struct { | ||
| QueryServer | ||
| mu sync.Mutex | ||
| } | ||
|
|
||
| // GetValue returns the value of a key. | ||
| func (p *PluginMeshStorage) GetValue(ctx context.Context, key []byte) ([]byte, error) { | ||
| p.mu.Lock() | ||
| defer p.mu.Unlock() | ||
| if !types.IsValidPathID(string(key)) { | ||
| return nil, errors.ErrInvalidKey | ||
| } | ||
| err := p.Send(&v1.QueryRequest{ | ||
| Command: v1.QueryRequest_GET, | ||
| Type: v1.QueryRequest_VALUE, | ||
| Query: types.NewQueryFilters().WithID(string(key)).Encode(), | ||
| }) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| resp, err := p.Recv() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if resp.GetError() != "" { | ||
| if strings.Contains(err.Error(), "not found") { | ||
| return nil, errors.ErrKeyNotFound | ||
| } | ||
| return nil, fmt.Errorf(resp.GetError()) | ||
| } | ||
| if len(resp.GetItems()) == 0 { | ||
| return nil, errors.ErrKeyNotFound | ||
| } | ||
| return resp.GetItems()[0], nil | ||
| } | ||
|
|
||
| func (p *PluginMeshStorage) PutValue(ctx context.Context, key, value []byte, ttl time.Duration) error { | ||
| return errors.ErrNotStorageNode | ||
| } | ||
|
|
||
| func (p *PluginMeshStorage) Delete(ctx context.Context, key []byte) error { | ||
| return errors.ErrNotStorageNode | ||
| } | ||
|
|
||
| func (p *PluginMeshStorage) ListKeys(ctx context.Context, prefix []byte) ([][]byte, error) { | ||
| p.mu.Lock() | ||
| defer p.mu.Unlock() | ||
| err := p.Send(&v1.QueryRequest{ | ||
| Command: v1.QueryRequest_LIST, | ||
| Type: v1.QueryRequest_KEYS, | ||
| Query: types.NewQueryFilters().WithID(string(prefix)).Encode(), | ||
| }) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| resp, err := p.Recv() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return resp.GetItems(), nil | ||
| } | ||
|
|
||
| func (p *PluginMeshStorage) IterPrefix(ctx context.Context, prefix []byte, fn storage.PrefixIterator) error { | ||
| keys, err := p.ListKeys(ctx, prefix) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| for _, key := range keys { | ||
| value, err := p.GetValue(ctx, key) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if err := fn(key, value); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (p *PluginMeshStorage) Subscribe(ctx context.Context, prefix []byte, fn storage.KVSubscribeFunc) (context.CancelFunc, error) { | ||
| return func() {}, errors.ErrNotStorageNode | ||
| } | ||
|
|
||
| func (p *PluginMeshStorage) Close() error { | ||
| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| /* | ||
| Copyright 2023 Avi Zimmerman <[email protected]> | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| // Package plugindb contains an interface for performing storage queries | ||
| // over the storage APIs. | ||
| package plugindb |
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